DESCRIPTION
The M37274MA-XXXSP is a single-chip microcomputer designed with
CMOS silicon gate technology. It is housed in a 52-pin shrink plastic
molded DIP.
In addition to their simple instruction sets, the ROM, RAM and I/O
addresses are placed on the same memory map to enable easy pro-
gramming.
The M37274MA-XXXSP has a OSD function and a data slicer func-
tion, so it is useful for a channel selection system for TV with a closed
caption decoder.
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
PRELIMINARY
Notice: This is not a final specification.
Some paramentic limits are subject to change.
MITSUBISHI MICROCOMPUTERS
M37274MA-XXXSP
OSD function
Display characters ............................... 36 characters
!
12 lines
Kinds of characters ...................................................... 256 kinds
(In EXOSD mode, they can be combined with 16 kinds of extra
fonts)
Character display area ........................ CC mode : 16
!
26 dots
OSD mode : 16
!
20 dots
EXOSD mode : 16
!
26 dots
Kinds of character sizes ............................... CC mode : 2 types
OSD mode : 14 types
EXOSD mode : 6 types
It can be specified by a character unit (maximum 7 kinds).
Character font coloring, character background coloring
It can be specified by a screen unit (maximum 7 kinds).
Extra font coloring, raster coloring, border coloring
Kinds of character colors ............... CC mode : 7 kinds (R, G, B)
OSD mode : 7 kinds (R, G, B)
EXOSD mode : 5 kinds (R, G, B)
Display position
Horizontal ................................................................ 256 levels
Vertical .................................................................. 1024 levels
Attribute ...................... CC mode : smooth italic, underline, flash
OSD mode : border
EXOSD mode : border,
extra font (16 kinds)
Automatic solid space function
Window function
Dual layer OSD function
APPLICATION
TV with a closed caption decoder
FEATURES
Number of basic instructions ..................................................... 71
Memory size
ROM ....................................................... 40 K bytes
RAM .......................................................... 768 bytes
ROM correction memory ............................. 64 bytes
ROM for OSD ....................................... 11072 bytes
RAM for OSD .......................................... 1296 bytes
Minimum instruction execution time
......................................... 0.5
s
(at 8 MHz oscillation frequency)
Power source voltage ................................................... 5 V
10 %
Subroutine nesting ............................................. 128 levels (Max.)
Interrupts ....................................................... 18 types, 16 vectors
8-bit timers .................................................................................. 6
Programmable I/O ports (Ports P0, P1, P2, P3
0
, P3
1
) .............. 26
Input ports (Ports P4
0
P4
6
, P6
3
, P6
4
, P7
0
P7
2
) ...................... 12
Output ports (Ports P5
2
P5
5
) ...................................................... 4
12 V withstand ports .................................................................... 7
LED drive ports ........................................................................... 2
Serial I/O ............................................................ 8-bit
!
1 channel
Multi-master I
2
C-BUS interface ................................1 (2 systems)
A-D converter (8-bit resolution) .................................... 4 channels
PWM output circuit ......................................... 14-bit
!
1, 8-bit
!
7
Power dissipation
In high-speed mode .......................................................... 165mW
(at V
CC
= 5.5V, 8MHz oscillation frequency, CRT on, and Data
slicer on)
In low-speed mode ........................................................... 0.33mW
(at V
CC
= 5.5V, 32kHz oscillation frequency)
Data slicer
ROM correction function
4
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
M37274MA-XXXSP
PRELIMINARY
Notice: This is not a final specification.
Some paramentic limits are subject to change.
MITSUBISHI MICROCOMPUTERS
Number of basic instructions
Instruction execution time
Clock frequency
Memory size
Input/Output ports
Serial I/O
Multi-master I
2
C-BUS interface
A-D converter
PWM output circuit
Timers
Subroutine nesting
Interrupt
Clock generating circuit
Data slicer
ROM
RAM
OSD ROM
OSD RAM
P0
0
P0
2
,
P0
4
P0
7
P0
3
P1
0
, P1
5
P1
7
P1
1
P1
4
P2
P3
0
, P3
1
P4
0
P4
4
P4
5
, P4
6
P5
2
P5
5
P6
3
P6
4
P7
0
P7
2
ROM correction memory
I/O
I/O
I/O
I/O
I/O
I/O
Input
Input
Output
Input
Input
Input
71
0.5
s (the minimum instruction execution time, at 8 MHz oscillation fre-
quency)
8 MHz (maximum)
40 K bytes
768 bytes
11072 bytes
1296 bytes
7-bit
!
1 (N-channel open-drain output structure, can be used as 8-bit
PWM output pins)
1-bit
!
1
(CMOS input/output structure, can be used as 14-bit PWM output pin)
4-bit
!
1 (CMOS input/output structure, can be used as OSD output pin,
INT input pin, serial input pin)
4-bit
!
1 (N-channel open-drain output structure, can be used as multi-
master I
2
C-BUS interface)
8-bit
!
1 (CMOS input/output structure, can be used as A-D input pins)
2-bit
!
1 (CMOS input/output structure)
5-bit
!
1 (can be used as A-D input pins, INT input pins, external clock
input pins)
2-bit
!
1 (N-channel open-drain output structure when serial I/O is used,
can be used as serial I/O pins)
4-bit
!
1 (CMOS output structure, can be used as OSD output)
1-bit
!
1 (can be used as sub-clock input pin, OSD clock input pin)
1-bit
!
1 (CMOS output structure when LC is oscillating, can be used as
sub-clock output pin, OSD clock output pin)
3-bit
!
1 (can be used as data slicer input/output)
8-bit
!
1
1
6 channels (8-bit resolution)
14-bit
!
1, 8-bit
!
7
8-bit timer
!
6
128 levels (maximum)
External interrupt
!
3, Internal timer interrupt
!
6, Serial I/O interrupt
!
1,
OSD interrupt
!
1, Multi-master I
2
C-BUS interface interrupt
!
1,
Data slicer interrupt
!
1, f(X
IN
)/4092 interrupt
!
1, V
SYNC
interrupt
!
1, A-
D conversion interrupt
!
1, BRK instruction interrupt
!
1
2 built-in circuits (externally connected to a ceramic resonator or a quartz-
crystal oscillator)
Parameter
Functions
FUNCTIONS
64 bytes
Built in
5
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
M37274MA-XXXSP
PRELIMINARY
Notice: This is not a final specification.
Some paramentic limits are subject to change.
MITSUBISHI MICROCOMPUTERS
Functions
5 V
10 %
165 mW typ. (at oscillation frequency f(X
IN
) = 8 MHz, f
OSC
= 13 MHz)
82.5 mW typ. (at oscillation frequency f(X
IN
) = 8 MHz)
0.33mW typ. (at oscillation frequency f(X
CIN
) = 32 kHz, f(X
IN
) = stopped)
0.055 mW (maximum)
10
C to 70
C
CMOS silicon gate process
52-pin shrink plastic molded DIP
Number of display characters
Character display area
Kinds of characters
Kinds of character sizes
Kinds of character colors
Display position (horizontal, vertical)
FUNCTIONS (continued)
OSD function
Power source voltage
Power dissipation
36 characters
!
12 lines
CC mode: 16
!
26 dots (dot structure: 16
!
20 dots)
OSD mode: 16
!
20 dots
EXOSD mode: 16
!
26 dots
256 kinds
(In EXOSDmode, they can be combined with 16 kinds of extra fonts)
CC mode: 2 kinds
OSD mode: 14 kinds
EXOSD mode: 6 kinds
CC mode: 7 kinds (R, G, B)
OSD mode: 7 kinds (R, G, B)
EXOSD mode: 5 kinds (R, G, B)
256 levels (horizontal)
!
1024 levels (vertical)
Data slicer ON
Data slicer OFF
Data slicer OFF
In high-speed
mode
In low-speed
mode
In stop mode
OSD ON
OSD OFF
OSD OFF
Operating temperature range
Device structure
Package
Parameter